using System;
using Org.BouncyCastle.X509;
/*
 * $Id: IPdfEncryptionSettings.cs,v 1.2 2007/04/29 13:57:00 psoares33 Exp $
 *
 * Copyright 2006 Bruno Lowagie
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

namespace iTextSharp.text.pdf.interfaces {

    /**
    * Encryption settings are described in section 3.5 (more specifically
    * section 3.5.2) of the PDF Reference 1.7.
    * They are explained in section 3.3.3 of the book 'iText in Action'.
    * The values of the different  preferences were originally stored
    * in class PdfWriter, but they have been moved to this separate interface
    * for reasons of convenience.
    */

    public interface IPdfEncryptionSettings {

        /**
        * Sets the encryption options for this document. The userPassword and the
        * ownerPassword can be null or have zero length. In this case the ownerPassword
        * is replaced by a random string. The open permissions for the document can be
        * AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations,
        * AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting.
        * The permissions can be combined by ORing them.
        * @param userPassword the user password. Can be null or empty
        * @param ownerPassword the owner password. Can be null or empty
        * @param permissions the user permissions
        * @param encryptionType the type of encryption. It can be one of STANDARD_ENCRYPTION_40, STANDARD_ENCRYPTION_128 or ENCRYPTION_AES128.
        * Optionally DO_NOT_ENCRYPT_METADATA can be ored to output the metadata in cleartext
        * @throws DocumentException if the document is already open
        */
        void SetEncryption(byte[] userPassword, byte[] ownerPassword, int permissions, int encryptionType);

        /**
        * Sets the certificate encryption options for this document. An array of one or more public certificates
        * must be provided together with an array of the same size for the permissions for each certificate.
        *  The open permissions for the document can be
        *  AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations,
        *  AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting.
        *  The permissions can be combined by ORing them.
        * Optionally DO_NOT_ENCRYPT_METADATA can be ored to output the metadata in cleartext
        * @param certs the public certificates to be used for the encryption
        * @param permissions the user permissions for each of the certicates
        * @param encryptionType the type of encryption. It can be one of STANDARD_ENCRYPTION_40, STANDARD_ENCRYPTION_128 or ENCRYPTION_AES128.
        * @throws DocumentException if the document is already open
        */
        void SetEncryption(X509Certificate[] certs, int[] permissions, int encryptionType);
    }
}